Metrohm viva 1.1 (ProLab) - Manual (Page 652)

5.5 Method run subwindow
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
640 ￭￭￭￭￭￭￭￭
viva 1.1 (for process analysis)
Principle
In the CP measuring mode with the option Measure galvanostatically
(see Glossary, page 1046), a constant current is applied to the working
electrode (see A) and the diffusion-controlled change in the electrode
potential over time is measured (see B).
In the CP measuring mode with the option Measure open-circuit
potential (see Glossary, page 1055), the circuit is opened and the
potential between the working electrode and the reference electrode is
measured during the indicated measurement duration (see B).
t
tot
I
const
t
interval
t
meas
A
t
interval
t
meas
Measure galvanostatically:
t
meas
≘ Plating time
Measure open-circuit poten-
tial:
t
meas
≘
Measurement duration
(see Chapter 5.5.2.11.4.4, page
647)
t
interval
Measuring interval (see page
648).
U
t
B
Sequence of individual steps
In the CP command, the following individual steps are successively exe-
cuted in the method run for the device defined in the command: